RT9241A Datasheet, PDF (7/17 Pages) Richtek Technology Corporation – Two-Phase DC/DC Controller for CPU Core Power Supply

RT9241A/B
Absolute Maximum Ratings
z Supply Voltage ---------------------------------------------------------------------------------------------------- 7V
z Input, Output or I/O Voltage ------------------------------------------------------------------------------------ GND-0.3V to V_DD+0.3V
z Power Dissipation, P_D @ T_A = 25°C
SOP-20 ------------------------------------------------------------------------------------------------------------- 0.625W
z Package Thermal Resistance
SOP-20, θ_JA ----------------------------------------------------------------------------------------------------------------------------------------------------- 110°C /W
z Ambient Temperature Range ----------------------------------------------------------------------------------- 0°C to 70°C
z Junction Temperature Range ----------------------------------------------------------------------------------- 0°C to 125°C
z Storage Temperature Range ----------------------------------------------------------------------------------- −40°C to 150°C
z Lead Temperature (Soldering, 10 sec.) ---------------------------------------------------------------------- 260°C
Electrical Characteristics
(VDD = 5V, GND = 0V, TA = 25°C, unless otherwise specified)
Parameter
Symbol Test Conditions
V_DD Supply Current
Nominal Supply Current
Power-On Reset
I_DD
PWM 1,2 Open
V_DD Rising Threshold
V_DD Falling Threshold
Hysteresis
V_DVD Rising Trip Threshold
Oscillator
Frequency
RT9241A
RT9241B
For each phase
Ramp Amplitude
Ramp Valley
Maximum On Time of Each Channel
Reference and DAC
DACOUT Voltage Accuracy
DAC (VID0-VID4) Input Low Voltage
DAC (VID0-VID4) Input High Voltage
DAC (VID0-VID4) Bias Current
PWM Controller Error Amplifier
DC Gain
Bandwidth
Slew Rate
C_L = 10pF
Min Typ Max Units
--
4
10 mA
4.2 4.35 4.6
V
-- 3.85 --
V
0.2 0.6
--
V
1.19 1.25 1.31 V
170 200 230
kHz
85 100 115
--
1.7
--
V
1.0 1.3
--
V
70
75 80
%
-1.0 -- +1.0 %
--
--
0.8
V
2.0
--
--
V
20
28
36
μA
--
85
--
dB
--
10
-- MHz
--
5
-- V/μs
To be continued
DS9241AB-05 March 2007
www.richtek.com
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